Problems with installer.

Okay, having big problems with the EB installer. Every time I try to install, the installer gets to the verifying data part, and then it says data is corrupted. I've tried it four times, reinstalling the game each time and downloading 1.3 patch, 1.5 patch, and EB from a different mirrior every time. Each time, it says a different file is corrupted. Any ideas on how to fix this? I've downloaded EB 3 or 4 times in the past, (due to ill-fated modding expiroments,) and this is the first time I've had a problem with it. The only thing that I've done differently this time is 1) I have a copy of the Rome-total War folder in the same Activision folder, and 2) I have ME2TW installed. Any advice on how to get EB installed? This is my favorite mod, (I personally think it's more fun then ME2TW), and I will miss it dearly if I can't get installed.